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A toppled campervan is causing traffic headaches for motorists in Auckland this afternoon.The campervan is on its side in the right northbound lane of the Southern Motorway, just south of the Penrose Rd overbridge between Mt Wellington…

At least 51 people are dead and dozens more injured after a train barreled into an unmanned truck that had rolled onto the track in Taiwan on Friday, becoming the country's deadliest rail disaster.

Many passengers were crushed, while some survivors were forced to climb out of windows and walk along the train's roof to safety.

The truck's emergency brake was not properly engaged, according to the government's disaster relief center, and the vehicle slid about 20 metres down a hillside.

READ MORE: Train derailment become Taiwan's deadliest rail disaster

Minutes later, the train's lead car crashed into it, according to Railways Administration official Weng Hui-ping, just before the train entered a tunnel.

The train, which was carrying more than 400 people, derailed near the Taroko Gorge scenic area on the first day of a long holiday weekend when many people were using Taiwan's extensive rail system, including many families with children.

Images from the scene showed the train's cars wedged against the tunnel's walls. Part of the wall of one car had smashed into a seat.

"Many people were crushed under train seats in the collision. And there were other people on top of the seats. So those at the bottom were pressed and crushed and lost consciousness," a passenger with gauze taped to her elbow told Taiwanese broadcaster EBC, which did not show her face or give her name.

"At the beginning, they still responded when we called them. But I guess they lost consciousness afterward."

The National Fire Service confirmed the death toll — which included the train's young, newly married driver and the assistant driver — and said more than 100 people were injured.

READ MORE: 'Illegal structures' found where Chinese boats gathered

The service earlier said all passengers had been accounted for, but a spokesperson later said there may be more bodies trapped in the mangled cars and the death toll may still rise.

The spokesperson spoke on condition of anonymity because they were not allowed to release the information to media.

Weng, of the Railways Administration, called the crash Taiwan's deadliest rail disaster.

He said a construction truck whose owner was a contractor for the administration slid from a work site above the track. No one was in the truck at the time.

An investigation has been launched, and Hualien police have interviewed one person, Weng said.

The stretch of track where the orange-striped train came to a halt hugs the coastline and lacks any protective fencing.

Yellow and red police tape marked the area of the crash, where tents had been set up and dozens of rescuers and officials had converged.

With much of the train still inside the tunnel, many escaping passengers had to scramble out of doors and windows and scale the sides of the train to walk along the roof in darkness to safety.

One young man interviewed by Taiwanese media at a hospital said he had travelled with friends for the holiday but now had no idea where they were.

"Everyone just went flying all over the place," said the man, who only gave his surname as Chen and who was in a wheelchair, his arm in a cast.

Obviously distraught and in pain, he said the cars and seats had been twisted out of shape.

Taiwan is a mountainous island, and most of its 24 million people live in the flatlands along the northern and western coasts that are home to most of the island's farmland, biggest cities and high-tech industries.

The lightly populated east where the crash happened is popular with tourists, many of whom travel there by train to avoid mountain roads.

In a tweet, Taiwanese President Tsai Ing-wen said emergency services "have been fully mobilised to rescue & assist the passengers & railway staff affected.

We will continue to do everything we can to ensure their safety in the wake of this heartbreaking incident."

The crash came on the first day of the four-day Tomb Sweeping Festival, an annual religious holiday when people travel to their hometowns for family gatherings and to pay their respects at the graves of their ancestors.

Taiwanese Premier Su Tseng-chang said the Railways Administration would be required to immediately conduct checks along other track lines to "prevent this from happening again."

About 50 volunteers from the Tzu Chi Buddhist Foundation stationed at an aid tent near the crash site said children were among the dozens who escaped the train cars.

They were treating minor wounds and offering lunches.

"We see people coming off the train and they look shaken and nervous," said Chen Tzu-chong, a Tzu Chi team leader on site.

Taiwan's last major rail crash was in October 2018, when an express train derailed while rounding a tight corner on the northeast coast, killing at least 18 people and injuring nearly 200.

In 1991, a collision in western Taiwan killed 30 people and another crash a decade earlier also killed 30.

Those were said to be the worst previous crashes on the rail system that dates from the late 19th century.

Taiwan's extensive rail system has undergone substantial upgrades in recent years, particularly with the addition of a high-speed line connecting the capital Taipei with west coast cities to the south.

The train involved in Friday's derailment, the Taroko No. 408, sometimes called the Taroko Express, is one of Taiwan's newer models.

One new locally acquired case of COVID-19 has been detected in Queensland today, as health authorities probe concerns a specific patient room within the Princess Alexandra Hospital may be to blame for the recent outbreaks.

Today's new case is a close contact of a positive case linked to the North Brisbane cluster.

The man has been in quarantine since March 27, after being identified as a close contact due to having visited the Black Hops Brewery in East Brisbane seven days prior.

He was tested as a close contact of a confirmed case and initially returned a negative result, but has since tested positive.

READ MORE: Blood clots likely 'nothing to do with' AstraZeneca vaccine, says expert

Chief Health Officer Dr Jeanette Young said the man posed "no risk" to the community as he had been in quarantine for his entire infectious period.

"The good news is that the lockdown has served its purpose in that the people we were tracing had been able to be quarantined before they were infectious, which is exactly the purpose in which we sought to have the lockdown," Queensland's Health Minister Yvette D'Ath said.

READ MORE: What Queenslanders can and can't do this Easter

There have also been two new cases detected in hotel quarantine, both of which are believed to be historical infections.

The results come from 25,837 COVID-19 tests conducted across Queensland in the past 24 hours.

In further good news for the state, 11 coronavirus patients were discharged from hospital in the past 24 hours, with 74 still remaining.

"But 74, of course, is still very high, and we are looking after those people in our hospital system currently," Ms D'Ath said.

Health authorities in Brisbane contine to investigate how doctors and nurses at the Princess Alexandra Hospital were infected by their patients, Dr Young today revealing there were particular concerns around a specific room within the isolation ward.

The Chief Health Officer said that the two COVID-19 patients who infected hospital staff both stayed in the same room within Ward 5D of the hospital, one after the other.

"We think there could be a problem with that particular room or the environment around that room," Dr Young said.

No new coronavirus cases are being admitted to the PA Hospital while that investigation takes place.

Testing of hospital staff has also been increased, with all frontline staff working directly with COVID-19 patients to be tested at the start of every shift, in the same way as those working inside quarantine hotels.

Dr Young said that up until now, this was thought unnecessary as medical staff were highly trained in the correct use of PPE but new, more infectious strains now made it necessary.

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Blood clotting is likely "nothing to do" with the AstraZeneca vaccine, one of Australia's leading epidemiologists has said.

Marylouise McLaws, advisor to the World Health Organisation (WHO) and professor at UNSW, said that we should not "be worried at all" that some countries have suspended their vaccine rollouts and that clotting is likely not linked to AstraZeneca.

"There are over 10 million people every year diagnosed with a clot. This particular one is very rare," she said on Today.

READ MORE: Child among three dead in NSW South Coast car crash

"When you've been vaccinated and you have one of these rare events, people get very anxious because they think there's some causation but there is probably likely to be no causation.

"I don't think we should be worried at all."

Professor McLaws said that there is also probably no connection to AstraZeneca in the man who suffered a blood clot yesterday in Melbourne.

"Before we start linking the dots, we just need to put this into perspective that this is a very rare event and it's likely not to do with AstraZeneca," she said.

"This man is 44, he is very young to be starting to get vaccinated so he's either healthcare or front-liner and has a particular need, a medical need to be vaccinated because the risk of COVID is great."

Asked about Australia's own rollout of COVID-19 vaccinations, Professor McLaws said that it has been "very slow".

"Look, the rollout has been very slow and in January I warned the public that this would be slow and an enormous undertaking," she said.

"We probably do need to relook at how we can do catch-up.

"I believe that Australia is now catching up with that frontline group, the quarantine workers and the frontline clinicians. They're our most important group. They need to be 100 percent covered."

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The Capitol police officer killed by a man who rammed a car into him and another officer at a barricade outside the US Capitol and then emerged wielding a knife has been named.

It was the second line-of-duty death this year for a department still struggling to heal from the January 6 insurrection.

Video shows the driver of the crashed car emerging with a knife in his hand and starting to run at the pair of officers, Capitol Police Acting Chief Yogananda Pittman told reporters.

Authorities shot the suspect, who died at a hospital.

READ MORE: Capitol riot suspect wore 'I Was There' shirt when arrested

Two law enforcement officials told The Associated Press that the suspect stabbed one of the officers.

The officials spoke to AP were not authorised to publicly discuss the pending investigation and spoke on condition of anonymity.

"I just ask that the public continue to keep US Capitol Police and their families in your prayers," Acting Chief Pittman said.

"This has been an extremely difficult time for US Capitol Police after the events of January 6 and now the events that have occurred here today."

Police identified the slain officer as William "Billy" Evans, an 18-year veteran who was a member of the department's first responders unit.

Authorities said that there wasn't an ongoing threat and that the attack did not appear to be related to terrorism, though the Capitol was put on lockdown as a precaution.

There was also no immediate connection apparent between Friday's crash and the January 6 riot.

The crash and shooting happened at a security checkpoint near the Capitol typically used by senators and staff on weekdays, though most are away from the building during the current recess.

The attack occurred about 91 metres from the entrance of the building on the Senate side of the Capitol.

One witness, the Reverend Patrick Mahoney, said he was finishing a Good Friday service nearby when he suddenly heard three shots ring out.

It comes as the Washington region remains on edge nearly three months after a mob of armed insurrectionists loyal to former President Donald Trump stormed the Capitol as Congress was voting to certify Joe Biden's presidential win.

READ MORE: Melbourne man suffers blood clots after receiving AstraZeneca vaccine

Five people died in the January 6 riot, including Capitol Police officer Brian Sicknick, who was among a badly outnumbered force trying to fight off insurrectionists seeking to overturn the election.

Authorities installed a tall perimeter fence around the Capitol and for months restricted traffic along the roads closest to the building, but they had begun pulling back some of the emergency measures in recent weeks.

Fencing that prevented vehicular traffic near that area was recently removed.

Law enforcement officials identified the slain suspect as 25-year-old Noah Green.

Investigators were digging into the suspect's background and examining whether he had any mental health history as they tried to discern a motive.

They were working to obtain warrants to access his online accounts.

Pittman said the suspect did not appear to have been on the police's radar.

READ MORE: US in danger of 'avoidable' COVID-19 surge, top health officials warn

But the attack underscores that the building and campus — and the officers charged with protecting them — remain potential targets for violence.

Evans is the seventh Capitol Police member to die in the line of duty in the department's history, according to the Officer Down Memorial Page, which tracks deaths of law enforcement.

Two officers, one from Capitol Police and another from Washington's Metropolitan Police Department, died by suicide following the January 6 attack.

Almost 140 Capitol Police officers were wounded then, including officers not issued helmets who sustained head injuries and one officer with cracked ribs, according to the officers' union.

It took hours for the National Guard to arrive, a delay that has driven months of finger-pointing between key decision-makers that day.

They were called upon soon afterward to secure the Capitol during Biden's inauguration and faced another potential threat in early March linked to conspiracy theories falsely claiming Trump would retake the presidency.

"Today, once again, these heroes risked their lives to protect our Capitol and our Country, with the same extraordinary selflessness and spirit of service seen on January 6," House Speaker Nancy Pelosi said in a statement.

"On behalf of the entire House, we are profoundly grateful."

The suspect had been taken to the hospital in critical condition.

One of the officers who was injured was taken by police car to the hospital; the other was transported by emergency medical crews.

The US Capitol complex was placed on lockdown after the shooting, and staffers were told they could not enter or exit buildings. Video showed National Guard troops mobilizing near the area of the crash.

Video posted online showed a dark colored sedan crashed against a vehicle barrier and a police K-9 inspecting the vehicle.

Law enforcement and paramedics could be seen caring for at least one unidentified individual.

Biden had just departed the White House for Camp David when the attack occurred.

As customary, he was traveling with a member of the National Security Council Staff who was expected to brief him on the incident.

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